diff --git a/polkadot/runtime/rococo/src/weights/mod.rs b/polkadot/runtime/rococo/src/weights/mod.rs
index 0ba21ccf322d..7328dca93936 100644
--- a/polkadot/runtime/rococo/src/weights/mod.rs
+++ b/polkadot/runtime/rococo/src/weights/mod.rs
@@ -23,7 +23,6 @@ pub mod pallet_bounties;
pub mod pallet_child_bounties;
pub mod pallet_conviction_voting;
pub mod pallet_identity;
-pub mod pallet_im_online;
pub mod pallet_indices;
pub mod pallet_message_queue;
pub mod pallet_multisig;
diff --git a/polkadot/runtime/rococo/src/weights/pallet_im_online.rs b/polkadot/runtime/rococo/src/weights/pallet_im_online.rs
deleted file mode 100644
index b866426de52a..000000000000
--- a/polkadot/runtime/rococo/src/weights/pallet_im_online.rs
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright (C) Parity Technologies (UK) Ltd.
-// This file is part of Polkadot.
-
-// Polkadot is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Polkadot is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Polkadot. If not, see .
-
-//! Autogenerated weights for `pallet_im_online`
-//!
-//! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
-//! DATE: 2023-05-31, STEPS: `50`, REPEAT: `20`, LOW RANGE: `[]`, HIGH RANGE: `[]`
-//! WORST CASE MAP SIZE: `1000000`
-//! HOSTNAME: `build-host`, CPU: `AMD EPYC 7601 32-Core Processor`
-//! EXECUTION: Some(Wasm), WASM-EXECUTION: Compiled, CHAIN: Some("rococo-dev"), DB CACHE: 1024
-
-// Executed Command:
-// ./target/production/polkadot
-// benchmark
-// pallet
-// --chain=rococo-dev
-// --steps=50
-// --repeat=20
-// --pallet=pallet_im_online
-// --extrinsic=*
-// --execution=wasm
-// --wasm-execution=compiled
-// --header=./file_header.txt
-// --output=./runtime/rococo/src/weights/
-
-#![cfg_attr(rustfmt, rustfmt_skip)]
-#![allow(unused_parens)]
-#![allow(unused_imports)]
-#![allow(missing_docs)]
-
-use frame_support::{traits::Get, weights::Weight};
-use core::marker::PhantomData;
-
-/// Weight functions for `pallet_im_online`.
-pub struct WeightInfo(PhantomData);
-impl pallet_im_online::WeightInfo for WeightInfo {
- /// Storage: Session Validators (r:1 w:0)
- /// Proof Skipped: Session Validators (max_values: Some(1), max_size: None, mode: Measured)
- /// Storage: Session CurrentIndex (r:1 w:0)
- /// Proof Skipped: Session CurrentIndex (max_values: Some(1), max_size: None, mode: Measured)
- /// Storage: ImOnline Keys (r:1 w:0)
- /// Proof: ImOnline Keys (max_values: Some(1), max_size: Some(320002), added: 320497, mode: MaxEncodedLen)
- /// Storage: unknown `0x39e295d143ed41353167609a3d816584` (r:1 w:0)
- /// Proof Skipped: unknown `0x39e295d143ed41353167609a3d816584` (r:1 w:0)
- /// Storage: ImOnline ReceivedHeartbeats (r:1 w:1)
- /// Proof: ImOnline ReceivedHeartbeats (max_values: None, max_size: Some(1028), added: 3503, mode: MaxEncodedLen)
- /// Storage: ImOnline AuthoredBlocks (r:1 w:0)
- /// Proof: ImOnline AuthoredBlocks (max_values: None, max_size: Some(56), added: 2531, mode: MaxEncodedLen)
- /// The range of component `k` is `[1, 1000]`.
- fn validate_unsigned_and_then_heartbeat(k: u32, ) -> Weight {
- // Proof Size summary in bytes:
- // Measured: `394 + k * (32 ±0)`
- // Estimated: `321487 + k * (1761 ±0)`
- // Minimum execution time: 132_910_000 picoseconds.
- Weight::from_parts(149_854_501, 0)
- .saturating_add(Weight::from_parts(0, 321487))
- // Standard Error: 3_317
- .saturating_add(Weight::from_parts(61_141, 0).saturating_mul(k.into()))
- .saturating_add(T::DbWeight::get().reads(5))
- .saturating_add(T::DbWeight::get().writes(1))
- .saturating_add(Weight::from_parts(0, 1761).saturating_mul(k.into()))
- }
-}
diff --git a/polkadot/runtime/westend/src/weights/mod.rs b/polkadot/runtime/westend/src/weights/mod.rs
index d8a2ae5d2da6..f6a9008d7187 100644
--- a/polkadot/runtime/westend/src/weights/mod.rs
+++ b/polkadot/runtime/westend/src/weights/mod.rs
@@ -24,7 +24,6 @@ pub mod pallet_conviction_voting;
pub mod pallet_election_provider_multi_phase;
pub mod pallet_fast_unstake;
pub mod pallet_identity;
-pub mod pallet_im_online;
pub mod pallet_indices;
pub mod pallet_message_queue;
pub mod pallet_multisig;
diff --git a/polkadot/runtime/westend/src/weights/pallet_im_online.rs b/polkadot/runtime/westend/src/weights/pallet_im_online.rs
deleted file mode 100644
index a83cd43804df..000000000000
--- a/polkadot/runtime/westend/src/weights/pallet_im_online.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright (C) Parity Technologies (UK) Ltd.
-// This file is part of Polkadot.
-
-// Polkadot is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Polkadot is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Polkadot. If not, see .
-
-//! Autogenerated weights for `pallet_im_online`
-//!
-//! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
-//! DATE: 2023-05-30, STEPS: `50`, REPEAT: `20`, LOW RANGE: `[]`, HIGH RANGE: `[]`
-//! WORST CASE MAP SIZE: `1000000`
-//! HOSTNAME: `build-host`, CPU: `AMD EPYC 7601 32-Core Processor`
-//! EXECUTION: Some(Wasm), WASM-EXECUTION: Compiled, CHAIN: Some("westend-dev"), DB CACHE: 1024
-
-// Executed Command:
-// ./target/production/polkadot
-// benchmark
-// pallet
-// --chain=westend-dev
-// --steps=50
-// --repeat=20
-// --no-storage-info
-// --no-median-slopes
-// --no-min-squares
-// --pallet=pallet_im_online
-// --extrinsic=*
-// --execution=wasm
-// --wasm-execution=compiled
-// --header=./file_header.txt
-// --output=./runtime/westend/src/weights/
-
-#![cfg_attr(rustfmt, rustfmt_skip)]
-#![allow(unused_parens)]
-#![allow(unused_imports)]
-#![allow(missing_docs)]
-
-use frame_support::{traits::Get, weights::Weight};
-use core::marker::PhantomData;
-
-/// Weight functions for `pallet_im_online`.
-pub struct WeightInfo(PhantomData);
-impl pallet_im_online::WeightInfo for WeightInfo {
- /// Storage: Session Validators (r:1 w:0)
- /// Proof Skipped: Session Validators (max_values: Some(1), max_size: None, mode: Measured)
- /// Storage: Session CurrentIndex (r:1 w:0)
- /// Proof Skipped: Session CurrentIndex (max_values: Some(1), max_size: None, mode: Measured)
- /// Storage: ImOnline Keys (r:1 w:0)
- /// Proof: ImOnline Keys (max_values: Some(1), max_size: Some(320002), added: 320497, mode: MaxEncodedLen)
- /// Storage: ImOnline ReceivedHeartbeats (r:1 w:1)
- /// Proof: ImOnline ReceivedHeartbeats (max_values: None, max_size: Some(1028), added: 3503, mode: MaxEncodedLen)
- /// Storage: ImOnline AuthoredBlocks (r:1 w:0)
- /// Proof: ImOnline AuthoredBlocks (max_values: None, max_size: Some(56), added: 2531, mode: MaxEncodedLen)
- /// The range of component `k` is `[1, 1000]`.
- fn validate_unsigned_and_then_heartbeat(k: u32, ) -> Weight {
- // Proof Size summary in bytes:
- // Measured: `361 + k * (32 ±0)`
- // Estimated: `321487 + k * (1761 ±0)`
- // Minimum execution time: 122_571_000 picoseconds.
- Weight::from_parts(162_954_849, 0)
- .saturating_add(Weight::from_parts(0, 321487))
- // Standard Error: 8_676
- .saturating_add(Weight::from_parts(11_122, 0).saturating_mul(k.into()))
- .saturating_add(T::DbWeight::get().reads(4))
- .saturating_add(T::DbWeight::get().writes(1))
- .saturating_add(Weight::from_parts(0, 1761).saturating_mul(k.into()))
- }
-}